Duns Both Gay and Sombre 



in never-ending succession, the indi- 

 vidual life of each insect, in its winged 

 state, being only a few hours, or at 

 most a few days. There is a wide dif- 

 ference in many species between the 

 male and the female, and Mr. Halford's 



Iron-blue dun Jenny spinner Pale evening dun 



latest patterns are tied in imitation 

 both of male and female. While there 

 are summer duns of brilliant hues 

 yellow, orange, red, and cinnamon 

 the prevailing color of duns may 

 be said to be a bluish-gray. Their 

 life in the winged state is short, 

 but in their aquatic form they live 

 sometimes two or even three years. 

 All ephemerida? are aquatic in their 

 earlier stages of existence. The eggs 

 [179] 



